已沉放钻孔桩变形钢护筒处理施工技术

钻孔桩的钢护筒,有时会因为地质等因素的影响,入土部分、特别是护筒底端部会产生变形,变形严重的会影响到钻孔桩的施工。过去常采用的处理方法虽然较多,但缺陷都比较明显,在比较现有常规处理技术的基础上,围绕钢护筒变形进行技术创新,研发了振动扩孔器及校正变形钢护筒的方法,并获得了国家发明专利。该技术可快速解决钢护筒变形问题,具有广泛的应用前景。

Construction technology of processing deformation steel tube for bored pile

The steel tube for the bored pile is produced deformation by the factor of geology,like the part of the bored pile under the ground,especially the bottom of bored pile will produce deformation,which has a strong impact on the construction of bored piles.There are a lot of methods used in processing the deformation of steel tube,however,the flaws are obvious.Based on the existing common treatment technology,we carry out the technical research of distortion steel tube,successfully develop the method of using vibration reamer to revise steel tube,and obtain the national invention patent.This technology is capable of resolving the problem of deformation of steel tube quickly,which has a good application prospect.